Physical Printer tab doesn't resolve printer DNS name on macOS
I have a Core One+ available at the address core-one-plus.mmoffice.net.
When I add the printer and test the PrusaLink connection (or send jobs to it with PrusaSlicer), I have no issues. But when I click on the 'Physical Printer' tab, I always get "Something went wrong." with a Reload button.
The Linux version of PrusaSlicer shows the printer's PrusaLink page correctly, and visiting the same address in a web browser on the same computer works fine too:

RE:
try:
sudo killall -HUP mDNSResponder
I recently had very weird issues with DNS under Mac (not in local net, though), and this helped, worth a try.
AFAIR PrusaSlicer uses chrome underneath, and this can be very picky at how DNS works....
See my GitHub and printables.com for some 3d stuff that you may like.

